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Oil pressure

Tiny
CHICO TREJO
  • MEMBER
  • 2002 CHEVROLET TRAILBLAZER
  • 0.6L
  • 6 CYL
  • 170,000 MILES
When I turn on the AC and drive down the highway for about forty minutes. When I get into the town and drive normal stop and go traffic with the AC still on my oil pressure starts to go way down and back up until I turn the AC off. I changed the oil already.
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Wednesday, July 11th, 2018 AT 8:36 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning.

The first thing I would do is to check the actual oil pressure with a manual gauge. You need to see if it is the switch sending wrong information or if the engine has an internal issue.

You can rent a tester at the parts store to perform this procedure. Once you do this, get back to me with the results.

Roy

https://www.2carpros.com/articles/high-or-low-engine-oil-pressure
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Thursday, July 12th, 2018 AT 4:50 AM

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